Hedgehogs have several defense mechanisms to protect themselves from predators. They are known for curling into a tight ball to shield their vulnerable belly and face with their spiky quills when they feel threatened. The sharp spines serve as a protective barrier, making it difficult for predators to attack them. Additionally, hedgehogs can also hiss, grunt, or release a foul-smelling odor as a warning to predators. These defense strategies help hedgehogs survive in the wild and avoid getting captured by their natural enemies.